US7372808B2 - Redundant transmission of protection commands between remote tripping devices - Google Patents

Redundant transmission of protection commands between remote tripping devices Download PDF

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Publication number
US7372808B2
US7372808B2 US10/396,838 US39683803A US7372808B2 US 7372808 B2 US7372808 B2 US 7372808B2 US 39683803 A US39683803 A US 39683803A US 7372808 B2 US7372808 B2 US 7372808B2
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remote tripping
tripping device
timeslots
multiplexer
communication channels
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US10/396,838
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US20030189899A1 (en
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Hermann Spiess
Michael Strittmatter
Mathias Kranich
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Hitachi Energy Ltd
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ABB Schweiz AG
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Assigned to ABB POWER GRIDS SWITZERLAND AG reassignment ABB POWER GRIDS SWITZERLAND AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ABB SCHWEIZ AG
Assigned to HITACHI ENERGY SWITZERLAND AG reassignment HITACHI ENERGY SWITZERLAND AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ABB POWER GRIDS SWITZERLAND AG
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations

Definitions

  • the invention relates to the field of protection technology for high-voltage and medium-voltage networks. It relates to a method and to a device for redundant transmission of protection commands between remote tripping devices as claimed in the precharacterizing clauses of patent claims 1 and 5 .
  • Remote tripping devices or protection signal transmission devices are used for transmitting protection or switching commands in electrical high-voltage and medium-voltage networks and systems, for example for distance protection.
  • Protection commands result, by way of example, in direct or indirect opening of a circuit breaker, and hence in electrical disconnection of a part of the network or of the system.
  • other protection commands result in the opening of a circuit breaker being blocked.
  • a rest signal or guard signal is transmitted continuously instead of this.
  • Protection commands need to be transmitted, for example, from one section of a high-voltage line to another.
  • a transmitter in a remote tripping device produces digital signals on the basis of the protection commands, which digital signals are transmitted via a digital signal connection, for example using an E1 (Synchronous Digital Hierarchy, SDH) or T1 (SONET) communication standard.
  • a receiver in another remote tripping device detects the transmitted signals, and determines the corresponding number and nature of the protection commands.
  • redundant transmission means are provided. In this case, by way of example, the receiver receives on a first channel and, if the channel is interrupted, is switched to a second channel.
  • the switching time which is required for this purpose is, however, 20 ms to 50 ms, which is too long for protection signal transmission.
  • a solution in which each protection device uses two interfaces to separate transmission paths is too complex.
  • the object of the invention is therefore to provide a method and a device for redundant transmission of protection commands between remote tripping devices of the type mentioned initially, which method and device overcome the disadvantages mentioned above.
  • useful information is thus transmitted by a first remote tripping device in at least two time slots via a first interface to a first multiplexer, and is transmitted by the multiplexer via different transmission paths, as a function of the time slots.
  • the useful information is received in a second multiplexer and is transmitted in an associated time slot via a second interface to the second remote tripping device, as appropriate for the respective transmission path.
  • FIGURE shows, schematically, a device for redundant transmission of protection commands between remote tripping devices.
  • the reference symbols used in the drawing and their meanings are listed in summarized form in the list of reference symbols.
  • FIG. 1 show, schematically, a device for redundant transmission of protection commands between remote tripping devices.
  • a first remote tripping device 1 is connected via a first interface 2 to a first multiplexer 3 .
  • At least one first transmission path 4 and one second transmission path 5 pass on from the first multiplexer 3 , with the transmission paths or transmission channels 4 , 5 being different than one another, to a second multiplexer 6 , which is connected via a second interface 7 to a second remote tripping device 8 .
  • the first interface 2 and the second interface 7 are, for example, known, standardized E1 or T1 interfaces.
  • data bytes from 24 channels are converted into a bit stream using a time-division multiplexing method; there are 30 channels in the E1 standard.
  • the bit stream is subdivided into a sequence of data frames, with one data frame comprising a synchronization bit and in each case one data byte of the individual channels. Successive data bytes of a specific channel are thus transmitted in periodically occurring time slots.
  • a useful information item which represents a protection command or a rest signal is transmitted as a bit pattern via not only one but via at least two channels of the interface. This transmission takes place in the same data frame, or in an immediately adjacent data frame, that is to say essentially at the same time.
  • the multiplexers 3 , 6 are used in a known manner to subdivide signals which are received on one or more interfaces between other interfaces, transmission paths or transmission channels.
  • the first multiplexer 3 is configured such that at least two of the channels or time slots are each allocated to one specific transmission path 4 , 5 .
  • the transmission paths 4 , 5 correspond to physically different lines and connections in a digital communications network of any topology, for example in accordance with a Synchronous Digital Hierarchy (SDH) Standard.
  • SDH Synchronous Digital Hierarchy
  • Such a standard defines, for example, point-to-point communications links via relay stations or router stations, which correspond to the transmission paths 4 , 5 used here between the multiplexers 3 , 6 .
  • time slots or channels which are not used on the first interface 2 and in the first multiplexer 3 are available for other purposes.
  • the second interface 7 likewise operates using a time-division multiplexing method, but not necessarily using the same method as the first interface 2 .
  • the second multiplexer 6 transmits useful information, which is received on a specific transmission path 4 , 5 , to an associated time slot in the second interface 7 . If none of the transmission paths 4 , 5 is interrupted, the second remote tripping device 8 thus receives the same useful information twice, and in different time slots in the second interface 7 . Although the second remote tripping device 8 requires twice as much computation power to evaluate the useful signals which are received twice, it does not require any additional hardware, however.
  • a combined protection command is formed, in one preferred embodiment of the invention, by a nonexclusive OR logic operation from a protection command which has been transmitted via the first transmission path 4 and from a protection command which is redundant with respect to the first protection command and has been transmitted via the second transmission path 5 .
  • the combined protection command is nevertheless formed without any switching delay.
  • the different transmission delays mean that it is possible for a switching command which is transmitted via the first transmission path 4 not to be received at the second remote tripping device 8 before the transmission via the second transmission path 5 has reached the second remote tripping device 8 .
  • the second remote tripping device 8 would receive the switching command twice.
  • either the switching command is sent by the first remote tripping device 1 at least during a time period which corresponds to the maximum delay time difference between the transmission paths 4 , 5 plus a safety margin, or the combined switching command is in each case emitted having been lengthened by this time period after the OR logic operation.
  • This procedure is also referred to as command lengthening or command prolongation, with typical values being 5 to 100 ms or more. This ensures that, when a delayed switching command arrives, the switching command or the combined switching command which has already arrived is still active.
  • a further advantage of the invention is that only interfaces 2 , 7 and multiplexers 3 , 6 which are required in any case are used. No additional hardware complexity is therefore required, just suitable programming of the multiplexers 3 , 6 and of the remote tripping devices 1 , 8 .

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  • Time-Division Multiplex Systems (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
US10/396,838 2002-04-09 2003-03-26 Redundant transmission of protection commands between remote tripping devices Active 2026-01-20 US7372808B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02405283A EP1353427B1 (de) 2002-04-09 2002-04-09 Redundante Übertragung von Schutzbefehlen zwischen Fernauslösegeräten
EP02405283.9 2002-04-09

Publications (2)

Publication Number Publication Date
US20030189899A1 US20030189899A1 (en) 2003-10-09
US7372808B2 true US7372808B2 (en) 2008-05-13

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US10/396,838 Active 2026-01-20 US7372808B2 (en) 2002-04-09 2003-03-26 Redundant transmission of protection commands between remote tripping devices

Country Status (6)

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US (1) US7372808B2 (de)
EP (1) EP1353427B1 (de)
AT (1) ATE428205T1 (de)
AU (1) AU2003202540B2 (de)
DE (1) DE50213428D1 (de)
ES (1) ES2325483T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070005193A1 (en) * 2002-10-25 2007-01-04 Nelson William Christian T Method and apparatus for control of an electric power distribution system in response to circuit abnormalities
US20150081126A1 (en) * 2013-07-16 2015-03-19 GridEdge Networks, Inc. Method and system for distributed generation trip protection using power line carrier signaling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016215640A1 (de) * 2016-08-19 2018-02-22 Robert Bosch Gmbh Verfahren, Sensor und Steuergerät zum Übertragen eines Datenpakets von einem Sensor zu einem Steuergerät

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626297A (en) * 1969-12-11 1971-12-07 Quindar Electronics Transfer trip system using quadrature carrier modulation with coherent detection
US3940566A (en) * 1973-09-27 1976-02-24 Telefonaktiebolaget L M Ericsson Arrangement for preventing interruptions in a time division multiplex transmission link for transfer of data
US4093825A (en) * 1976-03-11 1978-06-06 Post Office Data transmission system
US4380814A (en) * 1979-10-09 1983-04-19 Nippon Electric Co., Ltd. Baseband data switching apparatus for digital communications system
US4698802A (en) * 1986-03-07 1987-10-06 American Telephone And Telegraph Company And At&T Information Systems Inc. Combined circuit and packet switching system
US4819225A (en) * 1987-03-09 1989-04-04 Hochstein Peter A Redundant and fault tolerant communication link
EP0311251A2 (de) 1987-09-08 1989-04-12 Asea Brown Boveri Inc. Einrichtung und Verfahren zur sicheren digitalen Übertragung
US5034966A (en) * 1987-03-09 1991-07-23 Hochstein Peter A Redundant and fault tolerant communication link
US5065396A (en) * 1990-01-02 1991-11-12 At&T Bell Laboratories Inverse multiplexer and demultiplexer techniques
US5267231A (en) 1991-07-03 1993-11-30 Abb Power T&D Company Inc. Digital communication channel interface
US5577196A (en) * 1993-04-07 1996-11-19 Sprint Communications Co. L.P. Intelligent digital signal hitless protection switch
WO1999063635A1 (en) 1998-06-05 1999-12-09 General Electric Company Redundant communications in a protective relay
US6604137B2 (en) * 1997-07-31 2003-08-05 Mci Communications Corporation System and method for verification of remote spares in a communications network when a network outage occurs
US6680954B1 (en) * 1996-12-12 2004-01-20 Pmc-Sierra, Ltd. ATM inverse multiplexing system

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626297A (en) * 1969-12-11 1971-12-07 Quindar Electronics Transfer trip system using quadrature carrier modulation with coherent detection
US3940566A (en) * 1973-09-27 1976-02-24 Telefonaktiebolaget L M Ericsson Arrangement for preventing interruptions in a time division multiplex transmission link for transfer of data
US4093825A (en) * 1976-03-11 1978-06-06 Post Office Data transmission system
US4380814A (en) * 1979-10-09 1983-04-19 Nippon Electric Co., Ltd. Baseband data switching apparatus for digital communications system
US4698802A (en) * 1986-03-07 1987-10-06 American Telephone And Telegraph Company And At&T Information Systems Inc. Combined circuit and packet switching system
US5034966A (en) * 1987-03-09 1991-07-23 Hochstein Peter A Redundant and fault tolerant communication link
US4819225A (en) * 1987-03-09 1989-04-04 Hochstein Peter A Redundant and fault tolerant communication link
EP0311251A2 (de) 1987-09-08 1989-04-12 Asea Brown Boveri Inc. Einrichtung und Verfahren zur sicheren digitalen Übertragung
US5065396A (en) * 1990-01-02 1991-11-12 At&T Bell Laboratories Inverse multiplexer and demultiplexer techniques
US5267231A (en) 1991-07-03 1993-11-30 Abb Power T&D Company Inc. Digital communication channel interface
US5577196A (en) * 1993-04-07 1996-11-19 Sprint Communications Co. L.P. Intelligent digital signal hitless protection switch
US6680954B1 (en) * 1996-12-12 2004-01-20 Pmc-Sierra, Ltd. ATM inverse multiplexing system
US6604137B2 (en) * 1997-07-31 2003-08-05 Mci Communications Corporation System and method for verification of remote spares in a communications network when a network outage occurs
WO1999063635A1 (en) 1998-06-05 1999-12-09 General Electric Company Redundant communications in a protective relay

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070005193A1 (en) * 2002-10-25 2007-01-04 Nelson William Christian T Method and apparatus for control of an electric power distribution system in response to circuit abnormalities
US7860615B2 (en) * 2002-10-25 2010-12-28 S&C Electric Company Method and apparatus for control of an electric power distribution system in response to circuit abnormalities
US20150081126A1 (en) * 2013-07-16 2015-03-19 GridEdge Networks, Inc. Method and system for distributed generation trip protection using power line carrier signaling
US9733632B2 (en) * 2013-07-16 2017-08-15 GridEdge Networks, Inc. Method and system for distributed generation trip protection using power line carrier signaling

Also Published As

Publication number Publication date
AU2003202540A1 (en) 2003-10-23
US20030189899A1 (en) 2003-10-09
ATE428205T1 (de) 2009-04-15
AU2003202540B2 (en) 2008-03-13
EP1353427B1 (de) 2009-04-08
EP1353427A1 (de) 2003-10-15
ES2325483T3 (es) 2009-09-07
DE50213428D1 (de) 2009-05-20

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